Metric Buna O-Rings

OneMonroe’s Metric Buna O-Rings are engineered to provide reliable sealing performance across a variety of industrial and commercial applications. Made from high-quality Buna-N (Nitrile) rubber, these O-rings are known for their excellent resistance to oils, fuels, and other petroleum-based products, making them ideal for use in environments where durable, leak-proof seals are essential. Buna-N’s resilient properties allow it to maintain its integrity even in challenging temperatures, ranging from -40°F to 250°F, ensuring these O-rings can withstand both low and high-stress conditions with ease. With a broad range of metric sizes available, OneMonroe ensures you’ll find the right fit for your exact specifications.

Our Metric Buna O-Rings are crafted to offer outstanding resistance to abrasion and tearing, providing long-lasting performance in rigorous applications. This makes them well-suited for automotive, aerospace, marine, and hydraulic systems, as well as in general maintenance and repair settings. The unique chemical composition of Buna-N allows these O-rings to endure pressure and friction over extended periods without compromising their sealing capabilities, making them a reliable choice for static and dynamic sealing tasks. Each O-ring is manufactured to precise industry standards, ensuring a dependable fit and function in every installation.

With OneMonroe, you’re getting more than just a product; you’re receiving a commitment to quality and expertise. Our team is dedicated to supporting your projects with high-quality metric Buna O-Rings that meet both industry standards and specific customer requirements. We provide technical support to help you select the best O-ring for your application, offering detailed product specifications and guidance. Trust OneMonroe to deliver durable, efficient, and cost-effective sealing solutions tailored to meet the demands of your unique projects.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

Item #	IntegrationID	Type	Material	Cross Reference	Cross Section Width	Durometer	Inside Diameter	Product Guides
500 X 6 B-70	N/A 124561	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 500.00 mm	N/A Seal Guides
500 X 6 B-90	N/A 124562	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 500.00 mm	N/A Seal Guides
504 X 6 B-70	N/A 124563	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 504.00 mm	N/A Seal Guides
504 X 6 B-90	N/A 124564	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 504.00 mm	N/A Seal Guides
505 X 6 B-70	N/A 124565	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 505.00 mm	N/A Seal Guides
505 X 6 B-90	N/A 124566	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 505.00 mm	N/A Seal Guides
508 X 6 B-70	N/A 124567	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 508.00 mm	N/A Seal Guides
508 X 6 B-90	N/A 124568	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 508.00 mm	N/A Seal Guides
510x6.00B70	N/A 124569	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 510.00 mm	N/A Seal Guides
510 X 6 B-90	N/A 124570	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 510.00 mm	N/A Seal Guides
516 X 6 B-70	N/A 124571	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 516.00 mm	N/A Seal Guides
516 X 6 B-90	N/A 124572	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 516.00 mm	N/A Seal Guides
530 X 6 B-70	N/A 124573	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 530.00 mm	N/A Seal Guides
530 X 6 B-90	N/A 124574	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 530.00 mm	N/A Seal Guides
540 X 6 B-70	N/A 124575	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 540.00 mm	N/A Seal Guides
540 X 6 B-90	N/A 124576	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 540.00 mm	N/A Seal Guides
544 X 6 B-70	N/A 124577	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 544.00 mm	N/A Seal Guides
544 X 6 B-90	N/A 124578	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 544.00 mm	N/A Seal Guides
549 X 6 B-70	N/A 124579	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 549.00 mm	N/A Seal Guides
549 X 6 B-90	N/A 124580	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 549.00 mm	N/A Seal Guides
552 X 6 B-70	N/A 124581	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 552.00 mm	N/A Seal Guides
552 X 6 B-90	N/A 124582	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 552.00 mm	N/A Seal Guides
555 X 6 B-70	N/A 124583	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 555.00 mm	N/A Seal Guides
555 X 6 B-90	N/A 124584	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 90	N/A 555.00 mm	N/A Seal Guides
560 X 6 B-70	N/A 124585	N/A Metric Standard O-Ring	N/A Buna	N/A	N/A 6.00 mm	N/A 70	N/A 560.00 mm	N/A Seal Guides

N/A
124561

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 500.00 mm

N/A Seal Guides

500 X 6 B-90

N/A
124562

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 500.00 mm

N/A Seal Guides

504 X 6 B-70

N/A
124563

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 504.00 mm

N/A Seal Guides

504 X 6 B-90

N/A
124564

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 504.00 mm

N/A Seal Guides

505 X 6 B-70

N/A
124565

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 505.00 mm

N/A Seal Guides

505 X 6 B-90

N/A
124566

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 505.00 mm

N/A Seal Guides

508 X 6 B-70

N/A
124567

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 508.00 mm

N/A Seal Guides

508 X 6 B-90

N/A
124568

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 508.00 mm

N/A Seal Guides

510x6.00B70

N/A
124569

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 510.00 mm

N/A Seal Guides

510 X 6 B-90

N/A
124570

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 510.00 mm

N/A Seal Guides

516 X 6 B-70

N/A
124571

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 516.00 mm

N/A Seal Guides

516 X 6 B-90

N/A
124572

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 516.00 mm

N/A Seal Guides

530 X 6 B-70

N/A
124573

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 530.00 mm

N/A Seal Guides

530 X 6 B-90

N/A
124574

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 530.00 mm

N/A Seal Guides

540 X 6 B-70

N/A
124575

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 540.00 mm

N/A Seal Guides

540 X 6 B-90

N/A
124576

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 540.00 mm

N/A Seal Guides

544 X 6 B-70

N/A
124577

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 544.00 mm

N/A Seal Guides

544 X 6 B-90

N/A
124578

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 544.00 mm

N/A Seal Guides

549 X 6 B-70

N/A
124579

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 549.00 mm

N/A Seal Guides

549 X 6 B-90

N/A
124580

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 549.00 mm

N/A Seal Guides

552 X 6 B-70

N/A
124581

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 552.00 mm

N/A Seal Guides

552 X 6 B-90

N/A
124582

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 552.00 mm

N/A Seal Guides

555 X 6 B-70

N/A
124583

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 555.00 mm

N/A Seal Guides

555 X 6 B-90

N/A
124584

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 90

N/A 555.00 mm

N/A Seal Guides

560 X 6 B-70

N/A
124585

N/A Metric Standard O-Ring

N/A Buna

N/A

N/A 6.00 mm

N/A 70

N/A 560.00 mm

N/A Seal Guides